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Posted to issues@arrow.apache.org by "zeroshade (via GitHub)" <gi...@apache.org> on 2024/12/20 16:52:16 UTC

[I] [Parquet] Expose ReadRanges in Parquet FileReader [arrow]

zeroshade opened a new issue, #45092:
URL: https://github.com/apache/arrow/issues/45092

   ### Describe the enhancement requested
   
   Currently, in the Parquet library there is a significant infrastructure for computing the byte ranges that are necessary to read for a given set of columns and row groups in order to pre-buffer the file data via various caching mechanisms. Unfortunately, none of this infrastructure is externally exposed via the API.
   
   There's no way for a consumer to simply query what byte ranges of the file were going to be necessary to read specific columns and row groups without actually implementing their own `ReadRangeCache` and the FileReader assuming that they are actually performing the caching.
   
   We can add a simple function to the `FileReader` which returns the computed column chunk ranges, coalescing them as necessary, to provide this functionality information.
   
   ### Component(s)
   
   C++, Parquet


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Re: [I] [C++][Parquet] Expose ReadRanges in Parquet FileReader [arrow]

Posted by "zeroshade (via GitHub)" <gi...@apache.org>.
zeroshade commented on issue #45092:
URL: https://github.com/apache/arrow/issues/45092#issuecomment-2571730668

   Issue resolved by pull request 45093
   https://github.com/apache/arrow/pull/45093


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Re: [I] [C++][Parquet] Expose ReadRanges in Parquet FileReader [arrow]

Posted by "zeroshade (via GitHub)" <gi...@apache.org>.
zeroshade closed issue #45092: [C++][Parquet] Expose ReadRanges in Parquet FileReader
URL: https://github.com/apache/arrow/issues/45092


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